Extension leaf table



April 13, 1937. J. COOPER EXTENSION LEAF TABLE Filed July 9, 1936v 2Sheets-Sheet 1 lNvENToR ATTORNEY J. COOPER EXTENSION LEAF TABLE April13, 1937.

Filed July 9, 193e 2 sheetssheet 2 ATTORNEY Patented Apr. 13, 1937UNITED STATES EXTENSION LEAF TABLE Joseph Cooper, New York, N. Y.

Application July 9, 1936, Serial No. 89,903

3 Claims.

A characteristic of the present invention is the provision of one ormore extension leaves associated with a primary centrally disposed tableleaf movable vertically and actuated and controlled in such movements bycam members operatively connected to the extension leaves. If more thanone extension leaf is employed, there will be a plurality of cammembers, one or more for each leaf.

A specific object of the invention is to provide a table of the saidtype having a simple and inexpensive construction, and which will bepositive in its action, the cam member or members being simple in formand capable of stamping by a single stamping operation from sheet metal.

'Ihe invention will be described with reference to the accompanyingdrawings, in which:-

Figure 1 is a plan view, partly broken away, showing certain elements indotted lines, embodying the invention.

Figure 2 is an enlarged longitudinal section on the line 2-2, Figure 1.

Figure 3 is a perspective view of one of the supporting and control barsfor an extension leaf.

Figure 4 is an enlarged perspective view of the central section of oneof the supporting and control bars carrying one of the operating camsfor the central leaf of the table.

Figure 5 is a transverse section on the line 5 5, Figure 4.

Figure 6 is a transverse section of the table with two extension leavesin closed position, the section being taken generally in the same planeas line 8 8, Figure 1, looking in'the direction of the arrows.

Figure 7 is a transverse section of the table, similar to Figure 6,showing one of the extension leaves moved outwardly somewhat short ofits nal outward position.

Figure 8 is a view similar yto Figure 7, showing both leaves after theyhave been moved outwardly to extended position and then inwardly to nalextended position.

Figure 9 is a view similar to Figure 8 showing one of the leaves movedback to closed position and the right-hand leaf moved outwardly toextreme position preparatory to its return under the central leaf, andto closed position.

Figure 10 is a view similar to Figure 9, showing the right-handextension leaf moved from the position of Figure 9 part way under thecentra] leaf, the action of the cam being illustrated.

Figure 11 is a perspective view of the fixed guiding support carried bythe major bar for the central leaf and having a guiding and supportingaction upon the extension leaf bars.

Figure 12 is a View in bottom perspective of a corner. fragment of oneof the extension leaves ik showing the position of one of its supportingand control bars thereon.

'Ihe invention is adapted for a table constructed with a central leafand one or more extensionleaves, each having a rectangular frame as ofWood, covered with metal. However, the leaves may be primarily of Woodomitting the metal covering, if desired.

The table may comprise a'usual major frame comprising longitudinal framemembers such as the frame member I illustrated in Figure 2which may bedirectly attached each to two of the legs 2,' each set comprising alongitudinal frame member and two legs 2, being connected by transverseframe members 3. '20

Supported on transverse frame members 3 centrally thereof, is a primarysupporting bar 4 for the primary leaf of the table, this leaf comprisingthe longitudinal frame pieces 5, transverse frame pieces 6 andlongitudinal centrally disposed frame piece 5:12. The frame pieces 5, 5xand 6 are covered by metal sheathing 1.

'Ihe primary leaf is vertically movable. To guide the leaf in itsmovements central frame piece 5a: carries the depending guide studs 8which are vertically movable in bushing sleeves 9 carried by primarysupporting bar 4, as shown more particularly in Figure 2.

Each extension leaf may comprise the longitudinal frame pieces III andtransverse frame pieces II covered by a metal sheathing I2. Eachextension leaf has connected at its underface and to an appropriatelongitudinal frame member I0, two or more supporting and control barsI3.

Each bar I3 is longitudinally grooved at its opposite side faces, thegrooves being indicated at l3nt, Figure 3, and into each groove isprojected one arm I4a: carried by a fixed guiding support I4, shown inFigure 11. There is in the present embodiment one xed guiding support I4for each extension leaf bar I3, each support I4 being secured to theunderface of primary supporting bar 4 as shown more particularly inFigures 1 and 6 to 10 inclusive. Grooves |311: are of greater Width thanthe thickness of the arms I4a: of fixed guiding support I4 to enable anecessary transverse movement of bars I3 in the operation of theextension leaves as will later be explained.

In my construction the center leaf 'I is positively raised in theoutward movement of either extension leaf by reason of the fact that thecontrol bars I3 are mounted for movement angularly of the center leaf 'land therefore in the outward 5 movement of an extension leaf its uppersurface will bear upon the underlying frame of the center leaf and willcause it to raise in the manner shown in Figure '7.

When the extension leaf has been moved to a positionwclearing` theycenter leaf, thetlatter will drop by-'gr,avity, .and'zthereupon the.extension leaf may be moved inwardly to Figure 8.

The function of the operating cams l5 is to; hold the center leafupwardly during the beginl5 ning of a closing movement of theVJappropriate* leaf. To this end, in closing the table, theeapepropriete extension leaf is moved outwardly from I5 to be carried overupon the appropriate frame members l andinfbeari-ng'relation.witl'n'thefoverek lying framemember; 5'201?.I the:centenfleaf; the parts assumingv the* .position shown z in vFigure' 9'whereinnthe depending Ifiingers of vthe appropriate cams-.ilaengage theinnerfaoe of.;the.-; adjacent framelmemberl preventing further.' outwardmovement of the extensi'oru'leaf. Th'eilatter may thenbefimovedSirxwardlin;V pins I6 vriding.l idly in the center 'aperturesoffthefappropriate cam? I5' untill'therextension leaf. is` placed underthe -cent'er leaf as shown in'.V Figurer'- 1021; Further.y inwardcmovement. of thef'extensiomleaf will carrythe cams out ofengagemennfw'ith fram'efmemberfl` andv they .will dropi idly =.to-;thepositionr shownf in Figure 6 whenrthe extensionrleaf has .beexrmovediAto lfully closed position, the: flange |511; engaging; in eschcasa 'thetopznfthe control ban in which the cam isf-mounted;v

Having :described:myfinvention, what I clairny 40 and desire to secureby LettersP'atent is?` as followsr.:

1. Anextension' leaf table comprising a-frame, a 1 primary' leafvmounted` forf vertical -movement on' the frame, an extension leaf`normally und'e'r'.v

lying the primary leaf, and a cam member formed with a slot, aconnection between the cam member and the extension leaf including acontact member entering the slot of the cam member, the extension leafhaving a limited movement outwardly without transferring movement to thecam member, continued outward movement of said leaf causing the contactmember to engage the cam and effecting movement of the latter againsttheunderfacepf the-*center leaf, raising. the'. latten;reverse-..,movementf of the leaf causing idle movement of the contactmember in fthe cam slot.

2. An extension leaf table comprising a frame, a'primarydeaf mounted forvertical movement on theframaam extension leaf mounted for movement fromunder the primary leaf to outward position laterall'y--thereof, aplurality of control bars slidably movable upon an underlying member ofthe frame and carrying the extension leaf guidingmeansfor` confining.the movement, of the extension: leaf to an inclinedl .plane:intersecting thea-normally. horizontal. plane of 1 the primary witl'rvan-:uppermo'stf laterallyi. extended: flange i adapted to engage theupper surface of thereon?. trol4 bar; thief' camaleb being'formedzwitliA a wedge-like slotytheffacesnof thezcanrat the vopposite"ends: of fthe fslot'providing: the contactv if aces for 4thecontact"memberfscarriednby the :control bar, and the cam beingprovidedfat'; itsrear. por-A tion' with: ai depending..'nger.

J OSE'PI-Iv COOPER-l

